基于数值流形法的土质边坡动力稳定性分析

发布时间：2018-01-26 21:29

本文关键词： 数值流形法边坡动力分析黏性阻尼永久位移　出处：《岩土工程学报》2014年07期 　论文类型：期刊论文

【摘要】：由于对NMM动力作用下边坡的稳定分析研究较少,利用数值流形法(NMM)对这一问题进行了分析研究,引入黏性阻尼来耗散系统的能量,通过算例验证了NMM求解边坡永久位移的有效性;利用地震动力时程分析得到的边坡应力场计算出了边坡的动力安全系数时程曲线,并搜索得到地震时程下最小安全系数及其对应的边坡最危险滑裂面,将该最危险滑裂面模型作为NMM的计算模型进行永久位移的计算且与Newmark法得到的结果进行对比,两者结果相近。结果表明:NMM可有效进行边坡动力稳定分析、模拟计算边坡的永久位移。
[Abstract]:Because the stability analysis of slope under NMM dynamic action is less, the numerical manifold method is used to study this problem, and viscous damping is introduced to dissipate the energy of the system. The effectiveness of NMM to solve the permanent displacement of slope is verified by an example. The time-history curve of the slope dynamic safety factor is calculated by using the stress field of the slope obtained by seismic dynamic time-history analysis, and the minimum safety factor under the seismic time history and the most dangerous slip surface of the slope are obtained. The most dangerous sliding surface model is used as the NMM model to calculate the permanent displacement and the results are compared with the results obtained by Newmark method. The results show that the dynamic stability of the slope can be analyzed effectively and the permanent displacement of the slope can be simulated.
【作者单位】：大连理工大学;
【分类号】：TU435
【正文快照】： 0引言中国是一个多山、多地震的国家,边坡问题在中国是一个很重大的问题,尤其在地震作用下产生的滑坡可造成很大破坏,国内外对于边坡静力问题的研究很多也很成熟,但由于静荷载和动荷载的不同特点,边坡在静力和动力作用下的变形和破坏形式是不同的,边坡的动力问题更为复杂,同时

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